00001 /*!@file Media/MovieDecoder.C */ 00002 00003 // //////////////////////////////////////////////////////////////////// // 00004 // The iLab Neuromorphic Vision C++ Toolkit - Copyright (C) 2000-2005 // 00005 // by the University of Southern California (USC) and the iLab at USC. // 00006 // See http://iLab.usc.edu for information about this project. // 00007 // //////////////////////////////////////////////////////////////////// // 00008 // Major portions of the iLab Neuromorphic Vision Toolkit are protected // 00009 // under the U.S. patent ``Computation of Intrinsic Perceptual Saliency // 00010 // in Visual Environments, and Applications'' by Christof Koch and // 00011 // Laurent Itti, California Institute of Technology, 2001 (patent // 00012 // pending; application number 09/912,225 filed July 23, 2001; see // 00013 // http://pair.uspto.gov/cgi-bin/final/home.pl for current status). // 00014 // //////////////////////////////////////////////////////////////////// // 00015 // This file is part of the iLab Neuromorphic Vision C++ Toolkit. // 00016 // // 00017 // The iLab Neuromorphic Vision C++ Toolkit is free software; you can // 00018 // redistribute it and/or modify it under the terms of the GNU General // 00019 // Public License as published by the Free Software Foundation; either // 00020 // version 2 of the License, or (at your option) any later version. // 00021 // // 00022 // The iLab Neuromorphic Vision C++ Toolkit is distributed in the hope // 00023 // that it will be useful, but WITHOUT ANY WARRANTY; without even the // 00024 // implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR // 00025 // PURPOSE. See the GNU General Public License for more details. // 00026 // // 00027 // You should have received a copy of the GNU General Public License // 00028 // along with the iLab Neuromorphic Vision C++ Toolkit; if not, write // 00029 // to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, // 00030 // Boston, MA 02111-1307 USA. // 00031 // //////////////////////////////////////////////////////////////////// // 00032 // 00033 // Primary maintainer for this file: Rob Peters <rjpeters at usc dot edu> 00034 // $HeadURL: svn://isvn.usc.edu/software/invt/trunk/saliency/src/Media/MovieDecoder.C $ 00035 // $Id: MovieDecoder.C 9547 2008-03-28 23:32:43Z rjpeters $ 00036 // 00037 00038 #ifndef MEDIA_MOVIEDECODER_C_DEFINED 00039 #define MEDIA_MOVIEDECODER_C_DEFINED 00040 00041 #include "Media/MovieDecoder.H" 00042 00043 #include "Util/log.H" 00044 00045 // ###################################################################### 00046 MovieDecoder::~MovieDecoder() {} 00047 00048 // ###################################################################### 00049 bool MovieDecoder::setFrameNumber(int n) 00050 { 00051 if (n < this->apparentFrameNumber()) 00052 LFATAL("can't seek backwards in an movie stream " 00053 "(requested frame %d, but current frame is %d)", 00054 n, this->apparentFrameNumber()); 00055 00056 while (n > this->apparentFrameNumber()) 00057 { 00058 // read and discard frames until we get up to the desired frame 00059 // number 00060 if (this->apparentFrameNumber() % 200 == 0) 00061 LINFO("seeking to frame %d (currently at frame %d)", 00062 n, this->apparentFrameNumber()); 00063 const bool gotframe = this->readAndDiscardFrame(); 00064 if (!gotframe) 00065 { 00066 LINFO("end-of-stream at frame %d while trying to seek " 00067 "to frame %d", 00068 this->apparentFrameNumber(), n); 00069 00070 return false; 00071 } 00072 } 00073 00074 return true; 00075 } 00076 00077 // ###################################################################### 00078 /* So things look consistent in everyone's emacs... */ 00079 /* Local Variables: */ 00080 /* mode: c++ */ 00081 /* indent-tabs-mode: nil */ 00082 /* End: */ 00083 00084 #endif // MEDIA_MOVIEDECODER_C_DEFINED
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